Update haproxy to 2.2.9, and its base container to Debian 10.9.

container/Dockerfile.haproxy

 ARG go_version=1.15
-ARG debian_tag=10.2-slim
+ARG debian_tag=10.9-slim
 
 # Build k8s-crt-dnldr in the builder stage
 FROM golang:${go_version} as builder
@@ -16,7 +16,7 @@ FROM debian:${debian_tag}
 
 COPY buster-backports.list /etc/apt/sources.list.d/
 
-ARG haproxy_version=2.2.8-1~bpo10+1
+ARG haproxy_version=2.2.9-1~bpo10+1
 ARG dataplane_version=v1.2.4
 
 RUN apt-get update -q && apt-get install -y -q curl && \